Process of manufacturing carbons



XR 4289604 SR (No Model.)

PROCESS OF MANUFAC UW C. HESLEB T 4 Sheets-Sheet l LNG GARBONS. APatelfledMay 27, 1890.

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PROCESS 0F MANUFACTURING GARBONS. 1\Io.df28,604.Y Patented May 27, 1890. l F1319 ff'; www 0X1? Z/w QM/QJ {yf/f, t w y Q l y f, /rff/f//l/I/r. 727V fd/ @JJM g e e 9 (No Model.) I

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, C. HEISLBR. PROCESS 0F MANUFACTURING CARBONS.

Patented May 27, 18QO.

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C. HBISLYER.

PROCESS 0F MA'NUFAGTURINGCARBONS.

Patented May 27, 1890.

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Y CHARLES IIEISLER, OF ST. LOUIS, MlSSOURL-ASSIGNOR TO THE UNITED GS IMPROVEMENI COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

PROCESS OF MANUFACTURING CARBON-S.

SPECIFICATION forming part of Letters Patent No. 428,604, dated May 27, 1890.

Application filed May 5, 1887. Serial No. 237,247. (No model.)

To a-ZZ whom it may concern:

Be it tnewn that 1,'CH- rnnes ilnIsLER, of St. Louis, in the eountyof St.. Louis and State of Miss() iri, have invented a new and useful Improvement in Process of llianufacturing Cai-bons; and l do hereby declare that the following is. a full, clear, and exact description of the same.

)ly invention relates to the manufacture of :o carbon pencils used in arc lamps, and includes an improved process or method which is car-- ried out in successive steps by independent mechanical devices.

In the drawings, Figures l to 1S, inclusive, :5 cn Sheet l represent the various details used in the manufacture of carbone by my improved method. Figs. l0, 20, 2l, Q2, E33, and 2-, represent in side elevation and in section tiiepress and plunger for forming the carbon zo into the pencil shape. Figs. 25, QG, and 37 represent the table adjacent to the press for receiving the pencils aft-er they are formed in said press. Figs. 2S, fl, 30, and 3l represent the details relating to the racks for holding f the carbons during the time they are halted. it will be observed from the drawings that the complete process represented upon Sheet l is carried out by mechanical .devices and sulrprocesses for the various steps, which will o all be hereinafter' set forth, and particularly claimed. l'u Fig. l a mill, which may be of any suit# elite construction, is shown at A, in which the material o1" which the carbons are to be coin- ,pnscrl is' placed and ground to a finely-powdei-ed condition. This material thus ground is. mixed in a suitable mixer, as shown at l), hij; This ground and mixed material is neit fed into a hopper )l of a press provided H@with a plunger O, as shown in Fig. 6. Bc-

neath the bore of the press is placed a shell open :u:- both ends, (marked Q, liigs. 'T and 8,) und the plunger O presses the ground and mixed carbon into these shells or cases until hey are fulhand as one islillcdit isrenioved id. an empty one put in its place. ly the sse et the short cylinders or shcllsl am cnrhhfd te handle the material conveniently in its transmission from the mass in thc mixer tothe chamber of the hydraulic press, and also to accurately determine the. amount of material for each charge. The filled shells are placed wit-hin the bore of a press, (shown at A in Fig. 9,) which will be hereinafter particularly described, and a plunger workingin said bore forces the material from its case through the contracted4 mouth of the press, discharging it upon a table T,'as in Fig. l0, the material as thus discharged being of proper diameter for use. The carbons, after 6o they are discharged upon the tables, are cut into the propcrlengths bya suitable knife, as shown in Figs. :'26 and 27, andare then placed in a. suitable frame adapted to hold them separate and to receive tier after tier, which arc th'enplaced in adrying compartment el". the furnace ll, after which they are removed to another chamber in said furnace, where they are subjected to a thorough baking. After their removal from the furnace cach carbon is 7c taken and passed through a suitable straightening device, such as represented in diagram, Fig. l?, at lV. The earbons U are then sharpened on their points on a suitable grinding apparatus, as shown at X in Fig. lil. Holders Zare then applied to the ends of the carbons, and they are dipped into a bath of gasolincorsimilarmaterial,whichlillsalltheir porcs, and after this bath theyare dipped into the ordinary copper solution, as at Z in Fig. So 1U. They are then ready for use and maybe packed in boxes ier shipment.

,Yhile ordinary mechanical devices maybe utilized to carry out the ditlcncnt steps ci the process described as a whole, l have shown specific mechanism forforming the carhons, and will now describe thcsedcvices, and also a process for filling the porcs of the carhons with gas prior-to the ordinary coating of the same by copper solution. 9o

Taking these devices up in their order, l will first refer to the forming-press and receiving-table combined therewith. (Shown in Figs. 1E) to 2l, inclusive, Sheet 2.) lu these lgurcs represents the chamber in which the plunger l-` works, the said plunger having a cap j'screwed on the same, of a little larger diameter than the plunger, this cap beingr made of phosphor-bronze or similar material. The plunger is operated by any convenient roo mechai'iisin, as the compressor A', and in its forward movement the cap j' enters the melal shell containing the carbon out ot which the pencils are to be formed, which are placed in the chamber E in the forward end thereof.

A separate bore E ispreferably formed separate from the chamber A and screwed into the same, as shown in Figs. 2O and 91, and the passage through this part l is smaller than the diameterin which the shell is placed, tapering down to a point G, where the bore E2 begins, of uniform diameter throughout,which is formed in a piece 13, which is insertedinto the end of the piece E. vAs the plunger F is advanced the head f enters the metal shell and forces the carbon contained therein through the tapering channel in the Apart E', andthence through the channel -in :the part Edischargmg it. upon the table J, as shown in Fig. 25, the nozzle of the forming-press be ing in proximitypto the edge of the table.

It is very desirable during the formation of the carbon pencils in the forming-press to raise or llower the temperature, in order to facilitate the work and make the result more perfect. To this end I place a diaphragm, as shown in Fig. 2l ai'l G, around the periphery of the part E', which constitutes the nozzle of the press, this diaphragm forming a chamber entirely around the periphery, into which chamber pipes I open, which mar be in connection with a heating and cooling medium, and thus at will heat or cool the carbon as it passes through the nozzle of the press. The table, which is shown in Figs. 25 and 97, is adapted to receive the carbon from the nozzle of the press and to hold it in line with the nozzle by means' of the pivoted holder L. The table is formed with an inclined face, and the holder forms a little compartment at the upper edge, into which the carbon is discharged.

Upon its extreme outer edge the holder is prof vided with a knife, and when it is lifted to -allow the carbon to run down the inclined table to the lower part thereof the knife separates the pencil from the material still contained Within the nozzle.

lefo're applying the carbon to the ordinary bath of copper in solution I find that greatlyimproved results follow from filling the pores with gas, which prevents the penetration by the copper to theinterior of the carbon and keeps it simply as a coating' upon its outer surface. This bath is of gasoline or similar 'material, and the carbons are simply dipped into it, and the gaseous products of said fluids which remain in the pores of the carbon are proof against the penetration of the copper solution when the copper is applied to said bath.

CIL-XS. IIEISLER. Witnesses:

Moses B. MACLAY, ARCHIBALD MACLAY. 

